Question

Match the LIST-I with LIST-II

LIST-I Types of Sclereids	LIST-II  Examples
A. Astrosclereids	IV. Nymphea leaves
B. Macrosclereids	III. Kidney bean seeds
C. Osteosclereids	II. Olive leaves
D. Trichosclereids	I. Leaves of Monocots

Choose the correct answer from the options given below:

• A. A-I, B-II, C-III, D-IV
• B. A-IV, B-III, C-I, D-II
• C. A-I, B-II, C-IV, D-III
• D. A-III, B-IV, C-I, D-II

Hint:

To remember sclereid types, use their names as clues: Astro = star (like in Nymphea), Macro = large/columnar (like in seed coats), Osteo = bone (spool-shaped), Tricho = hair (like in olive leaves).

Answer 1

The Correct Option is B

Step 1: Concept Overview:
The task is to match sclereid types (stone cells) with their characteristic locations in plants. Sclereids are sclerenchyma cells with thick, lignified walls.
Step 2: Detailed Matching:
Matching each sclereid type with its example:

A. Astrosclereids: Star-shaped sclereids with radiating arms, typically found in the leaves and petioles of aquatic plants like water lilies ({Nymphea}). Therefore, A corresponds to IV.

B. Macrosclereids: Elongated, rod-shaped cells common in the seed coats of legumes, providing a hard protective layer. Kidney bean seeds are legumes. Therefore, B corresponds to III.

D. Trichosclereids: Hair-like, often branched sclereids found in leaves and stems, including Olive tree leaves ({Olea europaea}). Therefore, D corresponds to II.

C. Osteosclereids: Bone-shaped sclereids, enlarged at their ends, found in seed coats and leaves, notably in sub-epidermal layers of some monocot leaves. Therefore, C corresponds to I.

Step 3: Solution:
The correct matches are A-IV, B-III, C-I, D-II, which is option (B).